The BGS Lexicon of Named Rock Units — Result Details

Stickle Pike Tuff Member

Stratotypes:
Computer Code:	STPI	Preferred Map Code:	StPi
Status Code:	Full
Age range:	Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description:	Rhyolitic lapilli-tuff, pale-weathered, eutaxitic to parataxitic.
Definition of Lower Boundary:	At base of rhyolitic lapilli-tuff in the Lickle Tuff Formation that usually overlies volcaniclastic sandstone and locally rests on the Paddy End Tuff Member.
Definition of Upper Boundary:	Base of overlying Caw Sandstone Formation (volcaniclastic breccia and sandstone) or, locally, the Lag Bank Tuff Formation (dacitic lapilli tuff).
Thickness:	20 - 100m
Geographical Limits:	Within the Ulpha Basin southeast of the River Duddon. Turner Hall (SD 230 960) to Great Stickle (SD 211 915) and Lickle Valley (SD 240 920), Cumbria.
Parent Unit:	Lickle Tuff Formation (LICK)
Previous Name(s):	Stickle Pike Member [Obsolete Name and Code: Use STPI] (-1848) Lickle Rhyolites [Obsolete Name and Code: Use STPI, LICK] (-1657)
Alternative Name(s):	none recorded or not applicable
Type Area	Dunnerdale Fells. Between Yew Pike (SD 204 925) and Stickle Tarn (SD 213 928) and from Tarn Hill (SD 208 919) to Great Stickle (SD 2117 9159).
Reference(s):
Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38.
Mitchell, G H, 1956. (Undivided Lickle Rhyolites). The Borrowdale Volcanic Series of the Dunnerdale Fells, Lancashire. Liverpool and Manchester Geological Journal, Vol.1, p.428-449.
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E038

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